139603 has 4 divisors (see below), whose sum is σ = 140760. Its totient is φ = 138448.

The previous prime is 139597. The next prime is 139609. The reversal of 139603 is 306931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 306931 = 31 ⋅9901.

It is an interprime number because it is at equal distance from previous prime (139597) and next prime (139609).

It is a cyclic number.

It is not a de Polignac number, because 139603 - 2⁵ = 139571 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 373 + ... + 646.

It is an arithmetic number, because the mean of its divisors is an integer number (35190).

2¹³⁹⁶⁰³ is an apocalyptic number.

139603 is a deficient number, since it is larger than the sum of its proper divisors (1157).

139603 is a wasteful number, since it uses less digits than its factorization.

139603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1156.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 139603 is about 373.6348484818. The cubic root of 139603 is about 51.8758131193.

The spelling of 139603 in words is "one hundred thirty-nine thousand, six hundred three".